How to capture stream from multiple cameras and display images on one screen in a grid?

Question

.NET

There is a task to synchronously capture an image from 4 webcams, display it on one screen with a grid and, in the same way, write the grid to a file. I considered dshow for implementation (didn’t find free filters for merging streams into a grid, or a lot of brakes when rendering), aforge (didn’t find how to merged into a grid), I just started tinkering with ffmpeg. Google does not give clear explanations ... I would be glad for any help / advice. FFmpeg, judging by the descriptions and snippets of information from the network, should help solve this problem. Implementation is done in c#.
Thanks in advance!

Answer 1

stackoverflow.com/questions/15391368/how-to-combin...
ffmpeg.org/ffmpeg-filters.html#overlay-1
https://wiki.videolan.org/Mosaic